Agricultural tiller



FIG. 1 is a left, front perspective view of an agricultural tiller showing my new design;

FIG. 2 is a left side perspective view thereof;

FIG. 3 is a right side perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front perspective view thereof; and

FIG. 6 is a rear perspective view thereof. 

The ornamental design for an agricultural tiller, as shown. 